Berlin's http://soundcloud.com/phon-o talks about his workflow with NI gear and the free, exclusive kit he created for BATTERY 4.
You can grab a demo of Battery 4 along with the free kit here:
http://www.native-instruments.com/en/products/komplete/drums/battery-4/downloads/
And for more info on Battery 4, visit:
http://www.native-instruments.com/en/products/komplete/drums/battery-4/